The Waste Water Category under the Physical Pillar considers five core indicators to calculate the category Index. It primarily looks at coverage of toilets, sewerage network, extent of reuse, and storm water coverage.

A total of 5 parameters have been considered for determining the Waste Water Index. These have been explained below. Kindly click each parameter for detailed description and tentative sources of information.

No. Name Unit Benchmark
13.1 Coverage of toilets   Percentage 100%
Description:
The extent to which citizens have access to individual or community toilets in the city. These would include toilets in the category of residential, commercial, industrial and institutional properties. This should be computed for the number of properties recorded in municipal records and not households. SLBs for Urban Services developed by the MoUD provide guidance on the service levels for waste water management.
Expressed as:
Total number of properties with access to individual and/or community toilets

X 100 =
Total number of properties in the city
Methodology/ Interpretation and Sources of Data:
  • Total number of properties as per municipal records (not households) should be considered for the computation. A property may have multiple tenants/ households occupying it.
  • Data on number of properties with access to toilets can be obtained from the records available with the ULB. Where such data is unavailable sample field surveys may need to be conducted (random stratified sample) to estimate the proportion of properties (ward wise) without access to individual/community toilets.
  • Data on total properties can be obtained from the records of the ULB.
13.2 Coverage of sewerage network and/or septage   Percentage 100%
Description:
Denotes the extent to which waste water management facilities are available to individual properties across the city, whether through centralized underground sewerage, decentralized systems or on-site systems such as septic tanks. This should be computed for the number of properties recorded in municipal records and not households, and should include all residential, commercial, industrial and institutional properties. SLBs for Urban Services developed by the MoUD provide guidance on the service levels for waste water management.
Expressed as:
Total number of properties with connection to waste water management systems

X 100 =
Total number of properties in the city
Methodology/ Interpretation and Sources of Data:
  • Total number of properties as per municipal records (not households) should be considered for the computation. A property may have multiple tenants/ households occupying it.
  • Only properties with access connection to centralised underground sewerage network, or decentralised sewerage or onsite systems such as septic tanks should be included.
  • Properties that connect their waste water outlets to storm water drains or open drainage systems should not be included.
  • Data can be obtained from the records available with the ULB/ Water and Sewerage Utility.
13.3 Collection efficiency of sewerage network   Percentage 100%
Description:
This indicator denotes the actual proportion of waste water generated in the city that is collected by the available sewerage network. SLBs for Urban Services developed by the MoUD provide guidance on the service levels for waste water management.
Expressed as:
Total waste water collected per day

X 100 =
Total waste water generated in the city per day
Methodology/ Interpretation and Sources of Data:
  • Waste water generated in a city is assumed to be 80% of the total water consumed in mld. This data should be based on the water supplied to the distribution system after treatment, less physical losses of water due to transmission and distribution losses as available with the ULB/ Water and Sewerage Utility.
  • Where other sources are also used such as sourcing water from deep bore wells or tanker supply, the same should be included.
  • Waste water collected should be estimated on the basis of measurements taken at the inlet of centralised sewage treatment plants and decentralised waste water treatment systems (DEWATS). Data on quantum of wastewater collected can be obtained from ULB/ Water and Sewerage Utility.
13.4 Extent of reuse and recycling of waste water   Percentage 20% or more
Description:
This denotes the proportion of waste water received at the treatment plant that is recycled or reused for various purposes. Treated waste water can be used for horticultural purposes in parks and gardens, irrigation of farmlands on city periphery, and/or supplied to power plants and industries. SLBs for Urban Services developed by the MoUD provide guidance on the service levels for waste water management.
Expressed as:
Quantum of waste water recycled or reused per day

X 100 =
Total waste water received at treatment plants per day
Methodology/ Interpretation and Sources of Data:
  • SDG Target 6.3: By 2030, improve water quality by reducing pollution, eliminating dumping and minimizing release of hazardous chemicals and materials, halving the proportion of untreated wastewater and substantially increasing recycling and safe reuse globally
    • SDG Indicator 6.3.1: Proportion of wastewater safely treated
  • SDG Target 12.2: By 2030, achieve the sustainable management and efficient use of natural resources
13.5 Coverage of storm water drains   Percentage 100%
Description:
The extent to which the road network in the city is covered through a storm water drainage network (pucca covered drains). SLBs for Urban Services developed by the MoUD provide guidance on the service levels for storm water drainage.
Expressed as:
Total length of covered primary, secondary and tertiary drains (of pucca construction)

X 100 =
Total length of road network in the city
Methodology/ Interpretation and Sources of Data:
  • For the numerator only drains that are of pucca construction and are covered should be considered.
  • For the denominator only roads that have a carriageway of 3.5 metres or more should eb considered.
  • Data can be obtained from the ULB or estimated on the basis of maps available with the ULB.